NTK 23164 Oxygen Sensor - Downstream

Direct Fit Downstream Oxygen Sensor

NTK Oxygen Sensor 23164 is a direct fit, heated downstream sensor built for specific applications on the Fiat 500L and Dodge Dart. It uses a 4-wire design with a threaded 18 mm mounting style and a 12.25 in. wiring harness length for OE-style replacement coverage.

As part of NTK’s Direct Fit Oxygen Sensor line, this sensor is engineered for import and domestic vehicles with application-specific fitment and OE-focused coverage. NTK is a major original equipment oxygen sensor supplier, and this part is manufactured and tested to meet or exceed OE specifications for fit, form, and function.

Key Features

• Direct fit oxygen sensor for specific vehicle applications
• Heated sensor design for downstream exhaust monitoring
• 4-wire configuration with 12.2500 in. wiring harness length
• Threaded mounting type with 18.000 mm thread diameter
• OE-style replacement for Fiat 500L and Dodge Dart applications
• NTK part number 23164 for catalog and cross-reference lookup

Vehicle Fitment

• Fits 2014-2020 Fiat 500L, Downstream. B1S2 oxygen sensor meets OEM standards; Direct Fit Oxygen Sensor.
• Fits 2013-2016 Dodge Dart, Downstream. B1S2 oxygen sensor meets OEM standards; Direct Fit Oxygen Sensor.

Detailed Description

NTK 23164 is a downstream oxygen sensor for vehicles that require a specific-fit replacement with OE-style electrical and mounting characteristics. This sensor is built for the Fiat 500L and Dodge Dart applications listed above, making it a practical choice when replacing a worn or faulty downstream sensor on those platforms. The NTK Direct Fit Oxygen Sensor line focuses on application coverage, ceramic control, and manufacturing consistency to support reliable exhaust feedback performance.

This part cross-references Bosch 18145 and DENSO Auto Parts 234-4748 for the same application. When searching for an oxygen sensor for Fiat 500L or Dodge Dart downstream service, NTK 23164 is the catalog number to reference.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Incorrect exhaust oxygen readings reported by the engine control system
• Sensor response issues caused by age, contamination, or wear
• Emissions inspection failures tied to oxygen sensor performance
• Driveability concerns linked to inaccurate air-fuel feedback monitoring

Installation Notes and Tips

Confirm the downstream position and connector match before installation. Verify thread size, harness length, and wire count against the original sensor on the vehicle. For Fiat 500L and Dodge Dart applications, compare the existing sensor location and connector routing to ensure the replacement follows the OE-style layout.

Quality Assurance

NTK manufactures oxygen sensors with OE application coverage and extensive production testing to support quality and reliability that meets or exceeds OE specifications. The brand’s sensor-focused engineering and ceramics expertise are central to the Direct Fit Oxygen Sensor line.